Unit 8B

Breakdown of rock into smaller pieces by physical changes

Process of breaking down rocks into tiny particles called sediments

When water expands as it freezes in cracks and then thaws

When rocks are heated by day and cooled by night

When roots of plants break up the earth

When outer surface of rock peals due to pressure

Grinding and wearing down of rock by other rock or sand particles

The chemical breakdown of rocks and minerals into new substances

Dissolves rocks in 1000s of years

High acid contents in rain,sleet,or snow as a result of burning fossil fuels

Burning of fossil fuels, produces sulfur,carbon and nitrogen oxides which fall back into ground as rain/snow

Iron and oxygen form rust

Softer, less weather resistant rocks wear away leaving behind harder more resistant rocks

Oxidation happens more often in warm, humid climates

There is more exposure to wind, rain, and ice at higher elevations

Weathering, erosion, deposition

The process of moving sediment from one place to another

The process of dropping or depositing eroded materials/sediment in new locations

Deposition occurs when water slows down and materials are deposited along the stream/River bank,bed,or at the mouth forming a delta

Forms as a fan shaped deposit on dryland

The measure of change in elevation over a certain distance

Materials carried by the stream

When the wind is blowing,so a dunes slope side faces the wind

An ecosystem that covers a large area where the climate, organisms,and the soil are similar